求英语大神降临~ 一道英语版数学题(如下) ,求解并简单解释说明,谢谢~!在线坐等大神~on a certain number line, if -7 is a distance of 4 from N and 7 is a distance of 18 from N, then N = ?

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求英语大神降临~ 一道英语版数学题(如下) ,求解并简单解释说明,谢谢~!在线坐等大神~on a certain number line, if -7 is a distance of 4 from N and 7 is a distance of 18 from N, then N = ?
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求英语大神降临~ 一道英语版数学题(如下) ,求解并简单解释说明,谢谢~!在线坐等大神~on a certain number line, if -7 is a distance of 4 from N and 7 is a distance of 18 from N, then N = ?
求英语大神降临~ 一道英语版数学题(如下) ,求解并简单解释说明,谢谢~!在线坐等大神~
on a certain number line, if -7 is a distance of 4 from N and 7 is a distance of 18 from N, then N = ?

求英语大神降临~ 一道英语版数学题(如下) ,求解并简单解释说明,谢谢~!在线坐等大神~on a certain number line, if -7 is a distance of 4 from N and 7 is a distance of 18 from N, then N = ?
在某一数轴上,如果 -7 距离 N的距离是4并且7距离N的距离是18,那么,N=?
答案:-11